The bug
MCPE-72432 was fixed except for this. The enchantments applied to items ignore the seed, resulting in different enchantments every time.
How to reproduce
1. Create a world with seed -626760004
2. Go to the end
3. /tp -648 120 977
4. Look in the right chest and take note of the enchantments on the helmet
5. Repeat steps 1-4 again
→ ❌ The enchantments were different
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Note: in some unknown version the loot in the chest in the example seed changed to be iron pants and 6 diamonds, but the issue can still be reproduced